1+1=2

chapeau · 7 Sep 2012

it works when you use two different letters. If you substitute 1 for x and y then you get a divide by zero.

calorific · 7 Sep 2012

chapeau said:
it works when you use two different letters. If you substitute 1 for x and y then you get a divide by zero.

Yes, a zero divided by zero.

Sombrero · 7 Sep 2012

chapeau said:
it works when you use two different letters. If you substitute 1 for x and y then you get a divide by zero.

it works with letters becuase thats algerba. So are you saying the formula works unles x and y = 1?

StephenW · 11 Sep 2012

diynoob's formula begins with the phrase

For 2 non zero numbers x and y such that:
x = y

So, if x=y then (x-y) must be zero.

So the phrase (x+y)(x-y)=y(x-y) just proves that 0=0 and you can't divide by (x-y) if x and y have the same value.

diynoob · 11 Sep 2012

Yep, diving by (x-y) is the flaw in the 'proof'.

EddieM · 16 Sep 2012

EddieM said:
is this bit right??

(x+y)(x-y)=y(x-y)

Dividing by (x-y) gives:
x + y = y

no its not that, surely the alegbra is wrong :-

dividing by (x-y) doesn't give x + y = y does it??

my maths is horribly out of date.

pred · 16 Sep 2012

UriBentMySpoon said:
Wow the one person I tought would bite hasn't. Perhaps everyone else being humourously contrairy have unwittingly used up his arguments before he got to them.

Perhaps the 1 person you "tought" or thought would bite is maybe having difficulty adding 1+1, or he may have a "flat bat" syndrome in his calculator.

FiremanT · 18 Sep 2012

mitch66 said:
UriBentMySpoon said:

The next step is to tell me I have actually got my question wrong and state theat your answer is correct to the question I should have asked.

Click to expand...

Not if the wheels can't go faster than the conveyor.

Or if no one is there to see it

1+1=2

chapeau

calorific

Sombrero

StephenW

diynoob

EddieM

pred

FiremanT

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